Sarah said when x=3 then the value of 4x squared is 144
holly said when x=3 then the value of 4x squared is 36
who is right and why?
Holly if you have 2 expressions like this...4(x+1) Times 4(x+1) where x=3 then by substitution 4(3+1) Times 4(3+1) = 16 x16 or 256
Is it? 4X^2 or (4x)^2.
4X^2 = 4*3^2 = 4*9 = 36.
(4X)^2 = (4*3)^2 = (12)^2 = 144.
Sarah
To determine who is right, let's solve the equation for each case.
1. Sarah's statement: According to Sarah, when x=3, the value of 4x^2 is 144.
Substituting x=3 into the equation, we have:
4(3^2) = 144
4(9) = 144
36 = 144
2. Holly's statement: According to Holly, when x=3, the value of 4x^2 is 36.
Substituting x=3 into the equation, we have:
4(3^2) = 36
4(9) = 36
36 = 36
Comparing the results, we can see that Sarah's statement is incorrect while Holly's statement is correct. The value of 4x^2 when x=3 is indeed 36.